![KEY BISCAYNE, FL - MARCH 21: Venus Williams, Simona Halep, Nick Kyrgios and Jack Sock at the Eighth Annual Ritz-Carlton Key Biscayne, Miami All-Star Charity Tennis Event at the Ritz-Carlton Key Biscayne KEY BISCAYNE, FL - MARCH 21: Venus Williams, Simona Halep, Nick Kyrgios and Jack Sock at the Eighth Annual Ritz-Carlton Key Biscayne, Miami All-Star Charity Tennis Event at the Ritz-Carlton Key Biscayne](https://c8.alamy.com/comp/KKYMB7/key-biscayne-fl-march-21-venus-williams-simona-halep-nick-kyrgios-KKYMB7.jpg)
KEY BISCAYNE, FL - MARCH 21: Venus Williams, Simona Halep, Nick Kyrgios and Jack Sock at the Eighth Annual Ritz-Carlton Key Biscayne, Miami All-Star Charity Tennis Event at the Ritz-Carlton Key Biscayne
![Grand Slam Champion Simona Halep of Romania wears custom Nike tennis shoes during her 2018 US Open first round match at National Tennis Center Stock Photo - Alamy Grand Slam Champion Simona Halep of Romania wears custom Nike tennis shoes during her 2018 US Open first round match at National Tennis Center Stock Photo - Alamy](https://c8.alamy.com/zooms/6/fdcfaaadbb1b43318fc5c211d02468e1/r2egx7.jpg)
Grand Slam Champion Simona Halep of Romania wears custom Nike tennis shoes during her 2018 US Open first round match at National Tennis Center Stock Photo - Alamy
![KEY BISCAYNE, FL - MARCH 21: Venus Williams, Simona Halep, Nick Kyrgios and Jack Sock at the Eighth Annual Ritz-Carlton Key Biscayne, Miami All-Star Charity Tennis Event at the Ritz-Carlton Key Biscayne KEY BISCAYNE, FL - MARCH 21: Venus Williams, Simona Halep, Nick Kyrgios and Jack Sock at the Eighth Annual Ritz-Carlton Key Biscayne, Miami All-Star Charity Tennis Event at the Ritz-Carlton Key Biscayne](https://c8.alamy.com/comp/KKYMB5/key-biscayne-fl-march-21-venus-williams-simona-halep-nick-kyrgios-KKYMB5.jpg)